Not only was this famous American poem written by Robert Lowell, not the English poet Robert Graves, but it would be difficult to read it any worse than on this awful video.
No, this is not a good film at all. Like the book, it has the problem of a dramatic first half and a wearisome second half, mostly in the courtroom. The film's production history was slow and tortuous, involving a number of writers and film-makers who should have known better.
This is not nearly such a good recording as the BBC version with comments by Phil Sheppard. That one really does go off the map.